Flanders today october 17, 2012
#252
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Local elections: the yellow wave
Erkenningsnummer P708816
N-VA upsets established parties across Flanders Bart De Wever becomes mayor of Antwerp
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The state of the Ark
Tom Baetens, Tim Van Aelst and Bart Cannaerts of Flemish production house Shelter
© Hugo Willocx
Despite the acquisition of much new habitat, biodiversity in Flanders continues to deteriorate Toon Lambrechts
All is not well with nature in Flanders. In such a densely populated area, there is little room for wild corners, but, according to scientists, it is in our interest to stop the decline of biodiversity. We look at some of the species at risk and the reasons behind their struggles
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rofessor Kris Verheyen shows me a few graphs. The dominant colour is red: seldom a good sign. “Dramatic,” is his one-word summary of the state of Flanders’ biodiversity. Verheyen is head of Ghent University’s Laboratory for Nature and Forest, where he specialises in forest ecology and management, and his figures speak for themselves. About half of all species in Flanders are on the infamous Red List, which means they’re in the danger zone. As much as one-quarter has
severely deteriorated or is about to disappear. Another graph concerns breeding birds that nest here and are one of the indicators of biodiversity. The line that reflects their appearance in Flanders follows two different paths. “Each taxonomic group has its own story, but what you see here is surely a global trend,” explains Verheyen. “The species that live in the forests improve slightly, while the rest are in decline. This is because the Flemish forests are gradually aging and thus becoming more ecologically valuable, partly because there remains more dead wood. Meanwhile, the rest of the landscape degrades further.”
Broken chains Ecology and biodiversity are complex, and the reasons why so many species disappear in Flanders are intertwined. Five factors play a major role. First, there is the fragmentation
of the landscape. Flanders is one of the most fragmented regions in Europe. Habitats often disintegrate into pieces too small for many species to survive. Other factors have to do with agriculture. Large-scale agriculture relies on strong fertilisers, which cause the disappearance of habitats that need specific soils. Fertilisation also provokes acidification, and the effects of acidic soils are often linked with those of over-fertilisation. Flanders is also becoming drier, and has been for a long time. Industry, agriculture and drinking water provision absorb large volumes of water, reducing the level of groundwater and making wetlands disappear. Finally, there is pollution, although on this point much has been achieved. Remarkably, climate change and invasive species brought here by human intervention are not on the list of threats. ``continued on page 3